/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraEditorSettings.h
Gets a multicast delegate which is called whenever one of the parameters in this settings object changes.
static [FOnNiagaraEditorSettingsChanged](API\Plugins\NiagaraEditor\UNiagaraEditorSettings\FOnNiagaraEditorSettingsChanged) & OnSettingsChanged()